For a long time Newark RD was a mixture of Lincolnshire and Nottinghamshire.https://www.ukbmd.org.uk/reg/districts/newark.html
Try thishttps://www.ancestry.co.uk/search/collections/63150/records/22507412?_phcmd=u(%27https://www.ancestry.co.uk/search/collections/63150/?name=arundel_leakey&birth=1854&successSource=Search&queryId=6693ad45-5963-46f2-8e4d-0b952d9ae459%27,%27successSource%27)
I don't think that is the answer either. OK found it Robert Ralph Ash